Document Type : Research Paper
Authors
1 Assiatant Professor, Knowledge and Information Science, Yazd university. Iran
2 Assiatant Professor, Knowledge and Information Science, Yazd university, Iran
3 Master of Scientometrics, Yazd university, Iran
Abstract
Purpose: This paper aims at analyzing and mapping the patents related to the area of purification and recovery of hydrocarbon compounds in the USPTO (United States Patent and Trademark Office) system.
Methodology: The current research is of descriptive-analytical type and has dealt with using the co-citation patents analysis and the networking techniques. The data is extracted from class 585 and the subclasses 800 up to 868 in the field of purification and recovery of hydrocarbon compounds in the system USPTO system. Analyzingsis and mapping of data were done using Ucinet, Netdraw and Ravar Pre Map software.
Findings: During different years, the number of patents in the field of purification and recovery of hydrocarbon compounds has fluctuated a lotshowed an increasing trend. The Most productions occurred is in 2013 and the lowest is in 1971. The main Network from 2837 patents has composed of 325 pieces. BROUGHTON_2985589 was the patent with the highest number of centrality degree (510). Patents, with registration number 3684665, 3043891 and 3401112 ranked first, second and third respectively in based on betweenness centrality.
Conclousion: Co-citation patents analysis can be displayed the important patent and the relationship between them. This analysis can be used in the macro policies, or to identify gaps and fill in the gap
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